feat: proxies are updated if already in database

main.py

@@ -59,14 +59,22 @@ def main():
 
             # Save to DB
             session = session_factory.create_session()
-            proxy = Proxy(
-                host=proxy.split(':')[0],
-                port=int(proxy.split(':')[1]),
-                egress_ip=ip,
-                date_added=datetime.now(),
-                date_validated=datetime.now(),
-            )
-            session.add(proxy)
+            existing_proxy = session.query(Proxy).filter_by(host=proxy.split(':')[0],
+                                                            port=int(proxy.split(':')[1])).first()
+
+            if existing_proxy:
+                existing_proxy.date_validated = datetime.now()
+                existing_proxy.egress_ip = ip
+            else:
+                new_proxy = Proxy(
+                    host=proxy.split(':')[0],
+                    port=int(proxy.split(':')[1]),
+                    egress_ip=ip,
+                    date_added=datetime.now(),
+                    date_validated=datetime.now(),
+                )
+                session.add(new_proxy)
+
             session.commit()
 
     # Create output directory if it does not exist